Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/119009
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Abnormal concentrations of Cu-Co in Haumaniastrum katangense, Haumaniastrum robertii and Aeolanthus biformifolius: contamination or hyperaccumulation?
Author: van der Ent, A.
Malaisse, F.
Erskine, P.D.
Mesjasz-Przybyłowicz, J.
Przybyłowicz, W.J.
Barnabas, A.D.
Sośnicka, M.
Harris, H.H.
Citation: Metallomics : integrated biometal science, 2019; 11(3):586-596
Publisher: Royal Society of Chemistry
Issue Date: 2019
ISSN: 1756-5901
1756-591X
Statement of
Responsibility: 
Antony van der Ent, François Malaisse, Peter D. Erskine, Jolanta Mesjasz-Przybyłowicz, Wojciech J. Przybyłowicz, Alban D. Barnabas, Marta Sośnicka and Hugh H. Harris
Abstract: The Central African Copperbelt of the DR Congo and Zambia hosts more than 30 known Cu-Co hyperaccumulator plant species. These plants can accumulate extraordinarily high concentrations of Cu and Co in their living tissues without showing any signs of toxicity. Haumaniastrum robertii is the most extreme Co hyperaccumulator (able to accumulate up to 1 wt% Co), whereas Aeolanthus biformifolius is the most extreme Cu hyperaccumulator (with up to 1 wt% Cu). The phenomenon of Cu-Co hyperaccumulator plants was studied intensively in the 1970s through to the 1990s, but doubts arose regarding earlier observations due to surficial contamination of plant material with mineral particles. This study set out to determine whether such extraneous contamination could be observed on herbarium specimens of Haumaniastrum robertii and Aeolanthus biformifolius using scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS). Further, synchrotron X-ray absorption spectroscopy (XAS) was used to identify the chemical forms of Cu and Co in newly collected Haumaniastrum katangense plant material from the DR Congo. The results show that surficial contamination is not the cause for abnormal Cu-Co concentrations in the plant material, but rather that Cu-Co enrichment is endogenous. The chemical form of Cu and Co (complexation with carboxylic acids) provides additional evidence that genuine hyperaccumulation, and not soil mineral contamination, is responsible for extreme tissue concentrations of Cu and Co in Haumaniastrum katangense.
Rights: This journal is © The Royal Society of Chemistry 2019
RMID: 0030107524
DOI: 10.1039/c8mt00300a
Grant ID: http://purl.org/au-research/grants/arc/DE160100429
http://purl.org/au-research/grants/arc/DP140100176
Appears in Collections:Biochemistry publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.